I bought this camera in March and am using it together with my 20D. It is so good to have the ibgger LCD screen. I love the ISO settings that allows you to make small ISO changes. Been using this with the battery grip and with two Canon batteries. Took it on a tour and did not need to charge batteries for the length of time 6 days - shooting 4 gb plus every day minimal flashwork.
Images were sharp and particularly good but I am not use to seeing the colour and sharpness of images on the LCD screen- it seems different from the actual scene and LCD seems to make the images soft. Not sure what it is- any ideas? On computer, images looks good and sharp. Is there an LCD setting that I do not know of?
Otherwise, this is a great camera, I have also used it for really low shutter speed work 0.5sec handheld photographing waterfalls and it was amazing how steady the camera was. I like the weight balance with the battery grip. Also had the camera out in the rain for a few days of photography work, getting it all wet and drying it up after each session and not suffered any problems with it.
In fact both my 20D and 30D survived the rain and cold test extremely well. Really pleased with these two cameras and highly recommended.